I did quite some missions... But i think i missed some mini games.
I did get the cooking game, and the tree ofcourse, but shouldn't i have more at this point?

There are five minigames total: the tree, the bean, the mountain, the cooking pot, and the anvil.

Yeah.. I know, but i unlocked the mountain in the desert level, but how do i get the bean?
Btw, how do i get better weapons then fire / scorching? I'm at the catapult level.

Fire weapons seem to be the best you can get until you unlock the anvil and get some Mytheerial.

For the bean, as the mission Creatures of the Sand starts, keep defending so you can build up your fever in place, then use the Rain miracle. Advance a bit and there will be a purple snail. Kill it and it should have the Zakpon cap.

Yeah you just get them from playing through the game really. It's mainly about progress, and killing the snail like MusiKon says.
STARJET! HIS GAME SAYS MITHEERIAL TOO! Apparently the US release of the game just says Mithril, while the European version I had said Mitheerial. I don't think he believed me, but are you European MusiKon?

Nope, American. In fact, I unfortunately have not encountered any mytheerial, I just took that spelling from a guide I graze through now and then, to make sure I don't miss anything (because I accidentally skipped the bean as well).

I have the american version of the game and it just says Mithril. I believe some other version of the game says Mythreel or Mythril.

Very odd. I'm not sure about Mythreel, but yeah, mine just says Mitheerial.

I couldn't kill the purple slug it ran off, can I stil get that minigame? cuz I don't see it anymore

Yeah, I think if you do the rain spell at the start of the level, and keep it up when it runs out, it'll appear every time.

okay thanks